Polyglyceryl-8 Oleate is an emulsifier derived from oleic acid (a fatty acid) and glycerin, primarily used in the cosmetics and skincare industries. It is valued for its ability to stabilize water-oil emulsions, improve product texture, and act as an emollient. It is commonly found in skincare and hair care products due to its natural origin and gentle properties.
Chemical Composition and Structure
Polyglyceryl-8 Oleate is made by combining oleic acid, an unsaturated fatty acid, with polyglycerin, which is a modified form of glycerin. The presence of eight glycerol units enhances its water solubility and makes it an effective emulsifier, helping to blend oily and aqueous substances in cosmetic products.
Physical Properties
Polyglyceryl-8 Oleate appears as a viscous liquid or waxy solid depending on the temperature. It is soluble in oils and partially soluble in water, making it an ideal ingredient for stabilizing emulsions in cosmetic products. It also has emollient properties, helping to moisturize and soften the skin without leaving a greasy residue.
Production Process
Polyglyceryl-8 Oleate is produced through an esterification process, where oleic acid is bound to a polymerized glycerin chain. This chemical process is carefully controlled to ensure the stability of the final product and its safety in cosmetic applications.
Selection of Raw Materials: The main ingredients for producing polyglyceryl-8 oleate are olive oil and glycerol. Olive oil provides fatty acids, and glycerol acts as a polyvalent alcohol.
Glycerol Polymerization: Glycerol is polymerized to obtain polyglycerols of varying lengths. This process occurs through heating and sometimes in the presence of catalysts. The result is a mixture of polyglycerols, which can vary based on the chain lengths.
Esterification: The obtained polyglycerols are then treated with olive oil through an esterification process. This involves heating the polyglycerol with olive oil in the presence of a catalyst to promote the formation of polyglyceryl-8 oleate.
Purification: The produced polyglyceryl-8 oleate is purified to remove any impurities and chemical residues. This may include filtration and washing processes to ensure a high-quality product.
Quality Control and Packaging: Finally, polyglyceryl-8 oleate undergoes quality control checks to verify its purity and functional properties. After analysis, it is packaged for distribution and use in cosmetic and food products.
Applications
Cosmetics: Used as an emulsifier in creams, lotions, skincare products, and cleansers. It helps stabilize oil and water mixtures, improving texture and skin feel.
Hair Care: Used in shampoos and conditioners to help condition the hair, improving shine and elasticity.
Skincare: Its emollient properties make it a common ingredient in moisturizers, softening and hydrating the skin.
INCI Functions:
Surfactant - Emulsifying agent. Emulsions are thermodynamically unstable and are used to soothe or soften the skin and emulsify, so they need a specific, stabilising ingredient. This ingredient forms a film, lowers the surface tension and makes two immiscible liquids miscible. A very important factor affecting the stability of the emulsion is the amount of the emulsifying agent. Emulsifiers have the property of reducing the oil/water or water/oil interfacial tension, improving the stability of the emulsion and also directly influencing the stability, sensory properties and surface tension of sunscreens by modulating the filmometric performance.
CAS: 9007-48-1 75719-56-1
Health and Safety Considerations
Safety in Use
Polyglyceryl-8 Oleate is considered safe for use in cosmetic products. It is derived from natural ingredients and poses no known health risks when used according to established regulations.
Allergic Reactions
Allergic reactions to this ingredient are rare as it is generally well-tolerated by the skin. However, like any cosmetic product, irritation may occur in particularly sensitive individuals.
Toxicity and Carcinogenicity
It is widely used in cosmetics and approved by major regulatory authorities.
Environmental Considerations
As a plant-derived ingredient, Polyglyceryl-8 Oleate is considered environmentally sustainable. It is biodegradable and does not pose significant environmental risks.
Regulatory Status
Polyglyceryl-8 Oleate is approved by major regulatory authorities, including the European Union and the Food and Drug Administration (FDA) in the United States, for use in cosmetics.
